As a person pushes a box across a floor, the energy from the person's moving arm is transferred to the box, and the box

and floor become warm. During this process, energy is

-increased

-conserved

-destroyed

-decreased

2. Harry was having a Quidditch meeting with the Gryffindor team and they were figuring out what would increase the acceleration of the quidditch ball in the next match.

in an arcade game, a 1.12 kg disk is shot across a frictionless horizontal surface by being compressed against a spring and then released. If the spring has a spring constant of 230 N/m and is compressed from the equilibrium position by 6.

Which of the following is a sign that a chemical change has taken place when wood burns? bubbles rust production of a liquid production of heat

If you're looking for an instrument that tells what stars are made of, look for a a. stethoscope. b. spectroscope. c. telescope. d. stellar microscope.

Why does the weight of an object change and mass of an object does not change when the object is moved to a different planet

Which of the following elements is the most reactive? Beryllium Calcium Magnesium Barium

A flash of white light containing all the colors of the visible spectrum in air shines straight down on the surface of a pool.

A car accelerates uniformly from 0 to 15m/s in 5 s. Calculate acceleration.

Which device would a sleep researcher use to monitor a sleeping person's brain waves?

An experiment is performed to obtain the value of a physical property. If the true (i. e., correct) value of the property is 50 and the measured (i. e., experimental) value is 32, the percent error of the experimental result is: